Wall form system



W. H. KENNEY WALL FORM SYSTEM Jan. 5, 1965 3 Sheets-Sheet 1 Filed Nov. 16, 1961 INVENTOR. W/zz/AM A. A EA Y W Jan. 5, 1965 w. H. KENNEY 3,163,911

WALL FORM SYSTEM Filed Nov. 16, 1961 5 Sheets-Sheet 2 Jan. 5, 1965 w. H. KENNEY 3,163,911

mu. FORM sysm Filed NOV. 16, 1961 k 3 Sheets-Sheet 3 W 7 W 1% 4W 35. 9 13.5 l. 1. J 45: h- I 1 i i! iii I. l

FIG. 5

23 INVENTOR. Mam/w fill 0mm United States Patent 3,163,911 WALL FGEM SYSTEM William H, l'ienney, Tears-sch, NA, assignor, by means assignments, to William H. Kienney, Middletown, @hto Filed Nov. re, 1951, 1552,83 3 8 Claims. ($2. -l3l) This invention relates to wall form systems and particularly to combined metal and wood forms such as are used in concrete and cement pouring operations.

Presently known wall form systems generally fall into the all wood or combined metal and wood construction. All wood forms have proven unsatisfactory because of their short span of usefulness and their high cost of construction. In addition, wooden forms increases inweight due to their tendency to absorb moisture when exposed to the elements. a

Wood and metal forms as heretofore constructed have been heavy to handle, expensive to manufacture and subject to damage when being stripped from the finished Wall. In addition, a wide variety of complicated ties and fastening accessories have made the metal and Wood form difficult and expensive to. erect.

Accordingly, it is an object of the present invention to provide a combined metal and wood form system which will be lighter per square foot than existing forms.

Another object of the present invention is to provide a wall form system which is capable of being erected by relatively unskilledlabor. it

Anobject of the present invention is to provide an inexpensive Wall form system.

Still another object of t vide a wall form system requiring a minimum number of components for assembly.

An object of the present invention is to provide a wall form system capable of numerous reuses Without damage to the form panels.

e present invention is to pro- A further object of the present invention is to provide a wall form system using a straight rod type tie;

' An object of the present invention is to provide a wall form system which will result in a smooth pouring face on the finished wall.

A further object of the present invention is to-provide A feature of the present invention is its use of single frame elements which cooperate to reinforce, space, and secure adjacent form panels.

Another feature of the present invention is its use of easily installed and removed stiffener members.

Still another feature of the present invention is its use of straight rod type ties'which may be inserted or removed after the forms are erected. i

A further feature of the present invention is its use of a combined tie en aging form locking accessory. i

A feature of the present invention is its use of a novel stripping tool which prevents damage to the form."

The invention consists of the construction, combination and arrangement of parts, as herein illustrated,'de scribed and claimed. Y

In the accompanying drawings, forming a part hereof is illustrated one form of embodiment of the invention, in which drawings similar reference characters designate correspondingparts, and in which: I

FIGURE '1 is a somewhat isometric view of a. portionof a complete wall form assembly made in'accordance with the present invention.

FIGUREZ is a fragmentary exploded view on an enlarged scale of the panel supporting elements, shown in FIGURE 1. t

securing accessory. p 7

FIGURE 4 is a somewhat isometric view on an enlarged scale of the liner securing hooks and tie and panel securing members of the present form system with certain parts removed and certain elements shown in a somewhat exploded form for the purpose of clarity.

FIGURE 5 is a fragmentary View taken on line 55 in FIGURE 1.

FiGURE 6 is a fragmentary view taken on line 6- -6 in EEGURE 1.

EEGURE 7 is a fragmentary view in vertical section taken on line '77 in FIGURE 1.

FIGURE 8 is a fragmentary view of a tie rod made in accordance with the present'invention.

FIGURE 9 is a view in side elevation of, the stripping tool showing the manner inwhich the tie rod and frame are engaged for stripping purposes. FIGURE 10 is a view somewhat. similar to FIGURE 9 showing the form pulled away from .the poured concrete by the stripping tool. v

Referring'to the drawings and specifically to FIGURES 1 and 2, 28 indicates a wall form assembly consisting of a series of panels 21, secured together in side by side abutting relationship on opposite sides of an area into It will be seen from anexamlination of FIGURErl that each of the panels Ziconsist of a panel face member 23 made of a sheet of any suitable continuous material such as plywood,'hard .board or the like, and a supporting frame 24. It is important that the panel face material be waterproof and for this purpose the plywood maybe coated on all surfaces withany of the well known plastic type coating materials.

A frame 24 is secured to the back of each of the'panel face members 23, and in the present invention serves not only as a reinforcingmernber .forthe panel face member 23 but alsofperforms other functions hereinafter more fully described. The frame 24 consists of vertical members 2:5 and horizontal, membersi. The horizontal members 26 as best-shown in FIGURE 2, are cut away as indicated at 27 to receive therein one flange of the sub stantially angle iron shaped vertical memberjZS. The horizontal member 25 is further provided with inwardly ent plates 28 at each end thereof by means ofwhich the horizontal and verticalmembers are secured together.

In order to prevent concrete or cement from falling between the adjacent panels, spacer plates 29 are secured they are made of elongated sections of angle iron shaped steel one of the flanges of whichis provided with a series of rectangular shaped openings 30 and outwardly extending'embossingsfiil The openings 30 serve as the engagement points for the accessories which contribute to combining the panels'into; a wall'form assembly, The, em-;

bossings 31,.serve to. space adjacent panels from each other in order to permit ties 22 to beinserted therebe-j tween. As shown in FIGURE 1, the ties 22 are slipped through transversegrooves 33 which are provided in the edges of the panel face members 23. The framei i isalso.

spaced from the edge ofthe panel face members'a distance equal to the'depthof the grooves 33. When adjacent groovesare brought into registration they provide a I circular opening to receive the ties 22. I

secured at their ends by means of bolts 32 which are slipped through the holes 34, 35, provided in the vertical members and plates28, 29. The plates '29 aresuitably countersunk to receive the heads of the bolts32 so that a flat surface is presented on the adjacent plates 29.

' The panel face members 23 are secured to the frame flangesl35 by means of extremely flat headed bolts 36, best shown in FIGURES, These bolts, commonly known as elevator bolts, are made with a large thin head which when pulled tight sink into the panel face member and form a flush surface. The bolts 36 are slipped through holes in the panel face member 23 which are drilled in vertical members 25 are secured at their tops and bottoms to'the horizontal members26, in the manner hereinabove set forth. Holes (not shown) are drilled in the, panel face member 23 inregister with the space between the vertical members 25 at the center of the panel to receive therethrough ties 22. As shown in FIGURE ;1 the ties 22 extend beyond the verticalmembers 25 a short distance so that they may be grasped by other parts of the wall form assembly hereinafter referred to as accessories.

Horizontal stitfeners 38 are requiredbetween the vertical fr-amemembers 25 in panels such as the S'high panels shown in FIGURE 1. The stifr'eners are of angle iron cross-sectional shape and .fit between the verticalmembers 25 The stitfeners 3.3 are provided with outwardly extending tabs .39, 40, which slide into the rectangular opening 30 in the verticalmembers 25. The tabs 39 is somewhat longer than thetab 40, and a clearance 41 is. provided between the end of the stiffener 38 and the vertical member 25 adjacent thereto. Byreason-ofthe tab construction and the-clearance. 41, the stiifeners' can be inserted or, removed from. the wall panel; at. any, time. Accordingly, as many stilfeners as are required can be inserted merely by slipping the tab 39 into an opening 39, sliding it to the end of the clearance 41 and' then sliding I the opposite tab'40 into a similar opening in the opposite vertical member 25. 'T hereafter, a nail 42 may beslipped through a small hole 43 in the stiffener 38 which is provided adjacent theverticalmember 25 and through the larger of .thetabs 39, so that the stiffener 38 cannot be moved laterally withinthewall form. By reason of the easyapplication of the stiffener 38, the entire panel may be assembled or carried before the application of the stitfeners. .The panel is thus much lighter to handle than would be similar devices wherein the stitfenersare .perinanently secured to the vertical members.

fragmentary portion of the wall form assembly is illustrated, it will be seen that the abutting vertical members 25 are secured together by means of an accessory 47, hereinafter referred to as the locking accessory. The locking accessory consists of a flat plate 48 having a bifurcated portion 49 at one end thereof. The bifurcated portion 49 is disposed at substantially right angles to the plate 48 and is adapted to clamp the abutting 'vertical members 25 within the opening 50 of the bifurcated portion49. Bevels 51 are provided on each side of the opening 50 to cam the ends of the vertical members 25 together as they are being forced into the opening 50. The plate 48 is also provided with an outwardly extending car 52 opposite the bifurcated portion 49. The ear 52 lies in the plane of the plate .48 and an elongated slot 53 extends from the plate 48 into the ear portion 52.

As shown in FIGURE6, the embossings 31 on the hori zontal members. 26, at the top. of the panel 21 serve to space panels which may beplaced above the first row of panels the ,desireddistance from each other to receive therethrough ties22 or stub ties 44- such asare shown in FIGURE 7. The embossingsare formed along theinner edge of the outwa'rdly extending flange.

The stub ties 44 consist of short bar-like members having a very flat head 45 on the pouring end of the tie and a flattened portion 46 spacedfrom the opposite end of the scribed to receive the stub lllfiS '44. j 7

'Tie. securing accessories hereinaftermore .fully. de-

scribed inconnectiomwith FIGUREA engage. the stub, ties 44 at. the flattened portion 46 for the purpose of se-- tie 44. Holes are drilled in the'panel face or grooves are madein the panel edges in the manner hereinabove de.--

A captive key member 54 is slidably carried within the slot 53 and is held therein by a bent over portion 55 at one end'thereof.

The key 54 is somewhat L shaped and terminatesin a taperedwedge 56 which is received .within one of the openings 36, of the vertical members 25. The key 56 is also provided with a transverse bore 57 through which a nail 59 may be dropped after the key has been slipped through the abutting vertical members 25, to lock the key in place;

The lockingaccessory 47 is also provided with a keyhole slot 59, into which a tie 22 or stub tie 44 may be inserted. The narrow portion of the slot 59-is ofa size which will; accommodate the flattened portions 46, 69 of the ties and the large portion of the slot 59 is somewhat larger than the size of the ties so that-they may be slid therethrough.

Where it is desired to use liners in conjunction with the wall form assembly, they are secured to the panels in {the manner shown in FIGURE 4. For this purpose a liner clamp 66, together'with a captive bar 61 and wedge 62 is' employed. The bar 61 is provided with a slot 63 at its outer end and a laterally extending pin 64 spaced from its inner end The bar 61 is made, of steel having the same angle iron shape heretofore described in connection with the vertical and horizontal members. 63 receives therethrough thewedge 62 which is doubled back uponitself as shown'at 65 to prevent the wedge from falling out of the slot 63. The. wedge 62 bears against the outside of the liner clamp 6t) so that as it is driven intothe slot 63 it forces the clamp 60 into holding en: 'gag ement with the liners 66. It will be understood that the pin 64 must he slipped into one of the openings 30 in the vertical members 25, before the wedge 62 is driven against the clamp 69. The liners 66may be made of lengths of 2" x 4." lumber :in accordance with the well known procedure in the wall form art. The liners 66.are disposed on'the top and bottom of the bar 61 and are ernbraced by the liner clamp flanges 80. V

' When it is desired to remove the liners it is merely necessary to strike the bent over portion 65 of the wedge 62 to drive it upwardly through theslotv 63 until the liner clamp 60 becomes loosened. The bary61 may then be slid laterally to disengageth'e pin 64 from the openings. 30." Thereaften the' liner clamp assemblies may beremoved'andthe liners separated from the wall form sys-' of. {steel having a substantially circular cross-section and an overall dimension which will permit the tie to extend beyondthe frame members 25,26. The tie 2 2 is also.

The slot fabricate the panels it is merely necessary to take a notched as indicated at 67 to form a weakened point whereby the tie may be broken back within the concrete Wall after hardening. In this manner the opening made by the tie in the wall can be covered by means of cement in the well known manner. The tie 22 is flattened as indicated at 68 in FIGURE 8, to prevent the tie from rotating within the poured wall when it is sought to break the tie as hereinabove described. The tie Z2 is broken by means of a tool such as a Wrench (not shown) which engages the tie at a flattened portion 69 spaced from the outer ends of the tie. The flattened portion 69 forms a button 70 on the ends of the tie which is used to couple the tie to the frame of the panel; It will be noted that the tie 22, although provided with flats, 63, 6'), is still of an overall diameter such that it can be slipped through the openings formed by the grooves 33 in the panel face members 2.3 and the space between adjacent rame members of the panels 21. in this manner, ties may be inserted or removed at any time prior to pouring the concrete without disturbing the wall form assembly 2 3. In addition, the ties 22 may be broken'back within the finished concrete Wall Without disassembling the wall form ansembly merely by removing the locking accessory and twisting the projecting end of the tie 22 as hereinabove described. The wall form assembly 2% may be held together by means of bolts 71, best shown in FIGURE 4. The bolts 71 are slipped through adjacent openings in the vertical and horizontal frame members so that the wall form assemblies can be moved in one piece by cranes. It will be seen that after a large section of wall form panels so held together are moved to a newlocation, ties 22 can he slipped through and between the panels for further pour ng operations.

From the foregoing, the assembly and use of wall form systems will become apparent. When it is desired to standard piece of board such as a 4 x 8 piece coated plywood, drill the holes in the face to accommodate the bots .36 and bolt the frame members 25, 26, to the back of the plywood. -The frame members will'be spaced inwardly from the edge of the plywood as hereinaboye described,

to permit grooves 33 to be either cut or hammered into the edge of the plywood a depth sulficient to receive the ties 22 therethrough. A series of panels 21 are then I erected as shown in FIGURE l on either side of the footings (not shown) and maybe secured thereto in the well known manner. With the panels 21 in place the ties 22 can he slipped through the assembly at the desired location and the locking accessories applied to theends of the ties 22. The locking accessories are applied to the ties 22 by slipping the ends ofthe ties through the enlarged portion of the keyhole slot 59. Thereafter the accessory 47 is cammed inwardly so that the opening pulls the opposed edges of the frame member together in abutting relationship. The accessory is. then moved down along the frame members and'the tie slipped upwardly in the keyhole slot 59, which slot bears against the flattened portion 69 of the tie 22. When the accessory 47 has een driven down a distance far enough to bring the ends of the key 54 in line with an opening Shin the frame, the

key 54 is slid laterally within the slot 53'until the bore 57 in the wedge 56 extends beyond the frame members A nail 53 is then dropped into the bore 57 to lock the entire assembly into place. This operation is repeated wherever it is desired to secure a tie and frame together.

Liners are next applied to the assembly by slipping the pin t of the liner clamp assembly 69, into the registered openings 36 in the vertical frame members 25. As shown 7 p in FIGURE 4, the bar er of the liner clampassernbly is cut away as-indicated at 72, to form a bearing surface which rests upon-the outer edge of the vertical frame The inner end of the bar 61 will bear members 25.

against the inner flange of the vertical members and the entire liner clamp assembly will thus be held in place and 6 V 7 next brought to bear against the top and bottom of the bar 61 and the liner hook 73 moved inwardly until it embraces the liners 66. driven down until a tight engagement is made between the liner clamp assembly 60 and the liners 66-and panel frame.

are secured to the panel form structures.

The stilfeners 33 may next be inserted in'the wall frame adjacent the lowerportion of the wall form assembly and that less pressure is applied ,nearer the top. Contrary to previously kuown wall form assemblies which have stifieners disposed at uniform intervals over the entire panel, the present invention will enable an asymmetric disposition of the stitfenersSS which'will provide the greatest amount of strength where needed.

The stilleners are slipped in place in the manner herein.- above more fully described and locked by means of nails 42 slipped into the holes 43 which are provided adjacent the longer tabs 39. It will be noted from an' examination of FIGURE 5 that the tabs are embossedas indicated at V 74 to impart additional strength thereto. It will be under stood that the force applied to the-stifieners by the poured concrete will be normal to the face of the panel and that tlns force will be directed in the plane and not normal thereto." i

After the concrete orv cement has been poured the loch of the tabs 39, 4t);

ing accessories may be removed by "slipping the nail 58 out of the opening '57 and sliding the key 54. out ofthe opening 39. The locking accessory 47 can then bedriven upwardly by means of a. hammer or similar tool until the tie can be slipped outjof the keyhole slot 59. I The tie 22 can then be broken back by means ofa wrench which applies atwisting force to the ends of the .tie. The liners may be removed in a mannerheretofore described i and theentire wall form assembly 2t? (if bolted together) maybe moved as a single unit to the next pouring station. However, before the wall form'assembly can be moved Y and before the ties are broken back: it is important-to break the panels- 21 away from-"the'face' of the poured concrete; In FlGURES 9 and 10 there isshown a panel separating tool for use in. connection with the present forrn' assembly. The tool 75 consists of a substantially Z-shaped bar 76, having an outwardly extending pin 77 atone end thereof and a tie end receiving slot "78, spaced from the top of the bar 76. The lower portion of-thebar 76, consists ofa handle member '79 by means of which,

the tool is operated. Where it is desired to strip' the I form from the pouredface $1, the locking accessory 47 p is removed and the pin 77 slipped into openings 3% in the,

adjacent frame members 25. The slot 733s slipped over the end of the tie 22 and the handle 79 driven downwardly in a direction of the panel as shown in FIGURE 10. The 7 tool '76'thereupon acts asa cam to pull thefrarne and the panel-face member 2 3 free of the surface 31 of the concrete whereupon it can vbe rernoved with ease either by hand or by means of cranes. It will be understood that;

once the'wall form assembly 20 is loosened from the pour mg face'el it may be placed up against the facefor the purpose of breaking the. ties 22 back as hereinabove. I

described.

From the foregoing it will be seen that there hasbeen provided a wall form assembly system which is simple to construct and which maybe made inthe, field from a minimum number of metal partsand flat board panels Without the need for expensive Welding or riveting equipment. In additionythe panelsmay be shippedas metal components and the panel face members purchased locally thereby eliminating a s ubstantial 'element of freight costs.

Since the panels may be erected withoutplacing the stiff-' Thereafter, the wedge 62 is This operation is repeated until all of the liners eners in them until just prior to pouring,1individual panels are lighter to handle than corresponding prior art structures. Having thus fully described the invention what is claimed as new and desired to be secured by Letters Patent of the United States is:' e

1. A panel locking accessory for use'in concrete forms which have panel face members and angular frame members with legs extending away from said panel face members, said accessory comprising a plate, a bifurcated portion extending away from said plate andadapted to engage adjacent frame members, a tie-engaging opening in the plate, a laterally extending ear on the plate, an elongated slot in the plate and ear, a captivekey member slidably carried within the slot, and a wedge on the key member engageable with openings in said legs, to secure the accessory to the frame of adjacent'panel structures.

2. A liner clamp assembly comprising an elongated bar of angular shape throughout a portion of its length, a

laterally extending pin carried at onecnd of the bar, a bearing surfaceon said angular shaped portion of said bar, said surface being spaced from said end carrying saidpin, and parallel to said pin, the opposite end of the bar having a slot, a wedge member freely carried wtihin said slot, and a flanged liner embracing member having an opening to receive said bar and a face to be engaged by said wedge. 7

3. A'panel stripping tool comprising a substantially Z-shaped bar, a laterally extending pin carried at one end of said bar, a handle portion at the opposite end of said bar and a tie receiving socket in'termediatesaidpin and said handle portion.

4. A Wall form system comprising spaced'pan'eis, each.

of said panels comprising a panel face member, a frame on one side of said member, said frame comprising L- shaped angular metal members, each having a leg lying parallel to and extending inwardly of the edges of said panel face memberand a leg extending outwardly from said panel face member at substantially'aright angle thereto, said last mentioned legs being'spaced inwardly from thelateral edges of said panel face member, said last mentioned legs also having spaced perforations designed to mate with perforations in equivalent legs of other panels, said last mentioned legs having at intervals adjacentitheir outer edges V-shaped, outwardly, extending indentations designed to mate'with' similar indenta tions on equivalent legs of the frames of adjacent panel structures so as to maintainsaid legs in parallel, spaced 1 positions for the; passage of tie rods therebetween, the

lateral edges of the panel face member being notched to permit passage of the rods; 2. tie and panel locking accessory comprisingfa plate, a bifurcated portion extending away from said' plate and. adapted to engage adjacent frame members, a'tie' engaging opening in the plate, a laterally extending ear on the plate, an elongated slot in the plate and ear, a captive'key member slidably carried within the slot, and a wedge on the key member,engage:

, able with said perforations, in said legs extending away from said panel face member, to secure the accessory to the frame of adjacent panel structures. I

5. The. structure claimed in claim 4 including liners for-said wall form system, a liner. clamp assembly com:

prising an elongated bar of angular shape throughout a portion of its length, a laterally extending pin carried at one end of the bar, said pin engageable in a pair of said mating perforations in the frames of adjacent frame structures, the opposite end of the bar having a slot, a wedge member freely carried Within said slot, and a flanged liner-embracing member having an opening to receive said bar and a face to be engaged by said wedge.

6. The structure claimed in claim 4 wherein said tieengaging opening is a keyhole slot to engage one of a plurality of flattened portions of a tie spaced from the tie end, said flattened portions being selectively engage than the other, said. tabs being receivable within COlIC- spending ones of said openings in said legs which extend away from said panel face member after said frame has been assembled, the combined lengths'of the stiffener body member and said tabs being greater than said space whereby a tab may be extended through each of said outwardly extending legs, and whereby one at least of said tabs may be engaged by fastening means to hold said stiffening members in place.

8. The structure claimed in claim 6 including tie members, and wherein said tie members are provided with weakening notches inwardly spaced from flattened portions, and have tie anchoring second flattened pontions between said weakening notches.

References Cited bythe Examiner UNITED STATES PATENTS.

3/83 Furman 254l20 919,526 4/09 Belche-r l 24s 243 953,383 3/10 Holman, 1,779,908 10/30 -Graziano 25-131 2,236,616 4/41 BOSCO 25 131 2,234,149 5/42 Jones 2s 131 2,295,000 9/42 Muchet 25 13'1 2,351,403 6/44 Clark 29-267 7 2,613,424 10/52 Kenney. 2,859,503 11/50 Hennig 25-131 2,948,046 8/60 Imonetti 25-131 2,964,294 12/60 Imonetti 25 131 XR 3,007,221 11/61 Kenney. 3,010,175 11/61 Shoemaker -1 25 131 3,086,272 4 63 Ruth et al. 25 131 FOREIGN PATENTS 159,848 1/38 Switzerland. 7 8,406 4/04 Great Britain.

OTHER REFERENCES 1 Engineering News, Record Advertisement .12 Floors- Days, page 2, November 24, 1960. 4 

1. A PANEL LOCKING ACCESSORY FOR USE IN CONCRETE FORMS WHICH HAVE PANEL FACE MEMBERS AND ANGULAR FRAME MEMBERS WITH LEGS EXTENDING AWAY FROM SAID PANEL FACE MEMBERS, SAID ACCESSORY COMPRISING A PLATE, A BIFURCATED PORTION EXTENDING AWAY FROM SAID PLATE AND ADAPTED TO ENGAGE ADJACENT FRAME MEMBERS, A TIE-ENGAGING OPENING IN THE PLATE, A LATERALLY EXTENDNG EAR ON THE PLATE, AN ALONGATED SLOT IN THE PLATE AND EAR, A CAPTIVE KEY MEMBER SLIDABLY CARRIED WITHIN THE SLOT, AND A WEDGE ON THE KEY MEMBER ENGAGEABLE WITH OPENINGS IN SAID LEGS, TO SECURE THE ACCESSORY TO THE FRAME OF ADJACENT PANEL STRUCTURES.
 2. A LINER CLAMP ASSEMBLY COMPRISING AN ELONGATED BAR OF ANGULAR SHAPE THROUGHOUT A PORTION OF ITS LENGTH, A LATERALLY EXTENDING PIN CARRIED AT ONE END OF THE BAR, A BEARING SURFACE ON SAID ANGULAR SHAPED PORTION OF SAID BAR, SAID SURFACE BEING SPACED FROM SAID END CARRYING SAID PIN, AND PARALLEL TO SAID PIN, THE OPPOSITE END OF THE BAR HAVING A SLOT, A WEDGE MEMBER FREELY CARRIED WITHIN SAID SLOT, AND A FLANED LINER EMBRACING MEMBER HAVING AN OPENING TO RECEIVE SAID BAR AND A FACE TO BE ENGAGED BY SAID WEDGE.
 4. A WALL FORM SYSTEM COMPRISING SPACED PANELS, EACH OF SAID PANELS COMPRISING A PANEL FACE MEMBER, A FRAME ON ONE SIDE OF SAID MEMBER, SAID FRAME COMPRISING LSHAPED ANGULAR METAL MEMBERS, EACH HAVING A LEG LYING PARALLEL TO AND EXTENDING INWARDLY OF THE EDGES OF SAID PANEL FACE MEMBER AND A LEG EXTENDING OUTWARDLY FROM SAID PANEL FACE MEMBER AT SUBSTANTIALLY A RIGHT ANGLE THERETO, SAID LAST MENTIONED LEG BEING SPACED INWARDLY FROM THE LATERAL EDGES OF SAID PANEL FACE MEMBER, SAID LAST MENTIONED LEGS ALSO HAVING SPACED PERFORMATIONS DE- 